Sedimentological properties, bulk nitrogen and organic carbon elemental and isotopic compositions, and vascular plant biomarker loadings of suspended, bank, and bed sediments collected from the northern Mackenzie River basin, Canada

We collected water from river depth-profiles during the peak freshets in July 2013, June 2017, 2018, and 2019. Sampling locations are situated in the northern Mackenzie River basin: Mackenzie River in the delta, the Mackenzie River at Tsiigehtchic, the Arctic Red River at Tsiigehtchic, and the Peel River at Fort McPherson. Depth-profiles were retrieved using a horizontally-mounted ~5.1 L Niskin bottle. The collected water was subsequently filtered through 0.22 um polyethersulfone filters. Bank and bed sediments were retrieved using a metal spoon or dredged with a metal bucket. This data set contains grain size distribution, bulk nitrogen and organic carbon contents, radiocarbon contents for the particulate phase as well as vascular plant biomarker loadings.